package main

import "fmt"

func main() {
	student := make(map[string]int)
	student["John"] = 20
	student["bob"] = 18

	age, exist := student["christy"]
	if exist {
		fmt.Println("Christy's age is", age)
	} else {
		fmt.Println("Christy's age couldn't be found")
	}
}
